Hi!
I want to define add- and edit-views for objects of objects with
zope.schema.Object and zope.app.form.browser.ObjectWidget. Roger
Ineichen and Andreas Reuleaux explained (on this list) howto write
custom widgets for objects. I was trying to define a widget for objects
of objects (objects which's attributes are objects again), but didn't
get it for days. Tonight I got it! Since there is not yet a posting on
this problem on the list I decided to post it. Maybe this is a
zope3-newbie problem, but maybe this list is the right place for these
kinds of problems.
Instead of using the subwidget directive I defined a kind of 'medium'
class which inherits zope.app.form.browser.ObjectWidget and in
which--again--ObjectWidgets are defined. I don't know if this is good
zope3 style but it works fine. See file widget.py below...
Christian
file: interfaces.py
from zope.interface import Interface
from zope.schema import TextLine, Int, Object
class IPerson(Interface):
lastname = TextLine(
title=uLastname,
description=uPlease give the lastname.,
required=False)
firstname = TextLine(
title=uFirstname,
description=uPlease give the firstname.,
required=False)
class IPages(Interface):
start = Int(
title=uStart page,
description=uPlease give the start page.,
required=False)
end = Int(
title=uEnd page,
description=uPlease give the end page.,
required=False)
class IArticle(Interface):
author = Object(
schema=IPerson,
title=uAuthor,
description=uThe author of the article.,
required=False)
title = TextLine(
title=uArticle title,
description=uPlease give the title of the article.,
required=False)
pages = Object(
schema=IPages,
title=uPages,
description=uStart and end page of the article.,
required=False)
class INonsens(Interface):
article = Object(
schema=IArticle,
title=uArticle,
description=uA (nonsens) article,
required=False)
file: article.py
from zope.interface import implements
from objectsofobjects.interfaces import IPerson, IPages, IArticle, INonsens
from zope.schema.fieldproperty import FieldProperty
class Person:
The Person object.
implements(IPerson)
class Pages:
The Pages object.
implements(IPages)
class Article:
The article object.
implements(IArticle)
class Nonsens:
The nonsens object.
article = FieldProperty(INonsens['article'])
implements(INonsens)
file: widget.py
from zope.app.form.browser.editview import EditView
from zope.app.form import CustomWidgetFactory
from zope.app.form.browser import ObjectWidget, TextWidget
from zope.schema import TextLine
from objectsofobjects.interfaces import INonsens
from objectsofobjects.article import Person, Pages, Article
class Article_w(ObjectWidget):
This is the 'medium' class which inherits ObjectWidget
and in which ObjectWidgets are defined.
author_widget = CustomWidgetFactory(ObjectWidget, Person)
# (Note that you don't have do define a custom widget for the simple
TextLine 'title'!)
pages_widget = CustomWidgetFactory(ObjectWidget, Pages)
class NonsensEditView(EditView):
This is the customized EditView class.
__used_for__ = INonsens
#Give the 'medium' class Article_w as an argument to the contructor
of CustomWidgetFactory.
article_widget = CustomWidgetFactory(Article_w, Article)
file: configure.zcml
configure
xmlns='http://namespaces.zope.org/zope'
xmlns:browser='http://namespaces.zope.org/browser'
content class=.article.Person
require
permission=zope.View
interface=.interfaces.IPerson
/
require
permission=zope.ManageContent
set_schema=.interfaces.IPerson
/
/content
content class=.article.Pages
require
permission=zope.View
interface=.interfaces.IPages
/
require
permission=zope.ManageContent
set_schema=.interfaces.IPages
/
/content
content class=.article.Article
require
permission=zope.View
interface=.interfaces.IArticle
/
require
permission=zope.ManageContent
set_schema=.interfaces.IArticle
/
/content
content class=.article.Nonsens
require
permission=zope.View
interface=.interfaces.INonsens
/
require
permission=zope.ManageContent
set_schema=.interfaces.INonsens
/
/content
browser:editform
label=Change nonsens article data
name=edit.html
schema=.interfaces.INonsens
class=.widget.NonsensEditView
menu=zmi_views
title=Edit
